concatenative : Discuss the concatenative variety of computer languages: Joy, Forth, Postscript

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The best introduction to this subject is at the Joy homepage.

In short, concatenative languages behave in a way which looks imperative (like C or Perl), but can be reasoned about in a functional manner (like ML or Haskell).

These languages are only beginning to be studied, although Forth had a heyday in the 80s, and Postscript is notable for being the most commonly metaprogrammed language in existance (a trait which I believe is not a coincidence).

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Re: peg: a lazy, non-deterministic concatenative language ... Peg also uses lazy evaluation, but the pureness of the language means that: 1 2 + 3 7 4 - are all equivalent and indistinguishable, whether evaluated or Posted - Wed Apr 25, 2012 11:38 am	dustin.deweese Offline Send Email
Re: peg: a lazy, non-deterministic concatenative language ... This is why I prefer a pencil to a pen. Oh well. Point and laugh. ... I considered having separate stacks for each type in Peg. Each argument to a word Posted - Wed Apr 25, 2012 11:12 am	dustin.deweese Offline Send Email
Re: peg: a lazy, non-deterministic concatenative language ... Didn't anybody pick up this 'typo'? ... Think rather in term of the 'most recent' element. ] We know concatenative languages that use an accumulator and Posted - Wed Apr 25, 2012 9:54 am	eas lab lab.eas@... Send Email
Re: peg: a lazy, non-deterministic concatenative language On Fri, Apr 20, 2012 at 1:21 PM, William Tanksley, Jr <wtanksleyjr@... ... Present, just lazy :-) That's an interesting property, but it's not true of Posted - Mon Apr 23, 2012 4:25 am	Joshua Shinavier icouldntthin... Offline Send Email
Re: peg: a lazy, non-deterministic concatenative language ... The stack for any particular execution path has a total ordering. You could use non-determinism to make the stack appear only partially-ordered, though, Posted - Sun Apr 22, 2012 9:09 pm	dustin.deweese Offline Send Email
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